Wu, S.
, Liu, W.
, Wong-Ng, W.
, Gu, Q.
, Yao, J.
, Wang, C.
, Ma, S.
and Wang, S.
(2021),
Novel optical properties and induced magnetic moments in Ru-doped hybrid improper ferroelectric Ca3Ti2O7, Journal of Advanced Ceramics, [online], https://doi.org/10.1007/s40145-020-0425-2, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=929694
(Accessed April 19, 2024)
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Novel optical properties and induced magnetic moments in Ru-doped hybrid improper ferroelectric Ca3Ti2O7
Published
Author(s)
Sing S. Wu, Wei Fang Liu, , Qiang Gu, Jiang Yao, Chao Wang, Shuang Ma, Shouyu Wang
Abstract
Hybrid improper ferroelectric Ca3Ti2O7 and Ca3Ti1.9Ru0.1O7 ceramics were successfully synthesized by conventional solid-state reaction method. Two strongest diffraction peaks located around 2θ = 33° shifted towards the lower angle region with Ru substitution, reflecting structure variation. Grain growth and higher oxygen vacancy concentration after doping resulted in a reduction in the coercive field about 20 kV/cm. Optical bandgap estimated by UV−vis diffuse reflectance (DR) spectrum and X-ray photoelectron spectroscopy (XPS) valence band spectra showed a decreasing trend due to the existence of impurity energy level upon Ru doping, which was consistent with the results of first-principles calculations. The origin of the unexpected induced magnetic moments in Ru-dope Ca3Ti2O7 is also discussed.Citation
Journal of Advanced Ceramics
Volume
10
Issue
1
Pub Type
Journals
Download Paper
Keywords
oxides, electronic materials, optical properties, X-ray diffraction, defects, electronic structure, ferroelectricity
Citation
Created June 9, 2021, Updated October 14, 2021